Cytogenetic studies of the tuber-bearing Solanum species. : 2. On the tetraploid species and ad artificial octoploid plant in the series Longipedicellata Buk.
Cytogenetic studies of the tuber-bearing Solanum species. : 5. Phylogenetic relation between the cultivated tetraploid species, S. tuberosum L. and the diploid species, S. stenotomum Juz. et Buk..